DE102013222354A1 - METHOD AND SYSTEM FOR CONTROLLING A DRIVE TORQUE OF A VEHICLE - Google Patents

Abstract

A method and system that control a drive torque of a vehicle, wherein a change in a torque of a predetermined magnitude, when a drive power of the vehicle enters an area in which a predetermined maximum power is generated to allow a driver to feel that the drive power of the vehicle during driving reaches the maximum power range. The method may include calculating a drive request torque of a vehicle by controlling and calculating the drive power displayed on a drive power meter of a combination meter based on the calculated drive request torque. In addition, the method may include adding a predetermined additional torque to the drive request torque by the controller when the calculated drive power displayed on the drive power meter enters a predetermined range of the drive power meter.

Description

BACKGROUND

(a) Field of the invention

The present invention relates to a method and system that controls drive torque of a vehicle, and more particularly to a method and system that controls drive torque of a vehicle having a change in torque of a predetermined magnitude when the drive power of the vehicle is within a range in which a predetermined maximum power is generated to allow a driver to feel that the driving power of the vehicle reaches the maximum power range during driving.

(b) Description of the Related Art

As is well known, an instrument cluster that provides driving information and various information items is installed in a vehicle. The instrument cluster typically includes a speedometer that indicates a vehicle speed, an engine speed sensor that indicates a speed of an engine, and various warning lights that indicate a vehicle fault or a vehicle malfunction.

In addition, the combination meter may include a drive power meter (PG) that indicates the drive power of a vehicle, as in 1 shown. The drive power meter PG may be formed with a boosting and / or assisting zone (BAZ) indicating a range in which the driving power is increased. The BAZ is installed primarily within a hybrid vehicle that uses an efficient combination of engine power and propulsion engine power.

A hybrid vehicle can, as in 2 shown, for example, an engine 10 , a drive motor 20 , an engine clutch 30 , the power between the engine 10 and the drive motor 20 interrupts a gearbox 40 , a differential gear 50 , a battery 60 , an integrated starter generator 70 who is the engine 10 Launches or power through a torque of the engine 10 generated, and wheels 80 contain.

In addition, the hybrid vehicle may have a hybrid control unit (HCU). 200 operating the hybrid vehicle, an engine control unit (ECU) 110 that the engine 10 operated, a motor control unit (MCU) 120 that the drive motor 20 operated, a transmission control unit (TCU) 140 that the gearbox 40 actuated, and a battery control unit (BCU). 160 contain the battery 60 manages.

The BCU 160 can be referred to as a battery management system (BMS). The integrated starter generator 70 can be called Integrated Starter Generator (ISG) or Hybrid Starter Generator (HSG).

The hybrid vehicle described above may be driven in drive modes such as an EV mode, which is a pure hybrid vehicle mode in which only the power of the drive motor 20 is used, a hybrid electric vehicle mode (HEV mode), in which the torque of the engine 10 as the main power and the torque of the drive motor 20 is used as an auxiliary power, and a Nutzbremsmodus (RB mode), in which the braking and inertia energy through the power generation of the drive motor 20 is collected to the battery 60 to be charged when a vehicle is stopped (eg, the vehicle brake is applied) or the vehicle is traveling by inertia.

As described above, since the hybrid vehicle uses mechanical energy of the engine and electric power of the battery together, and utilizes optimum operating ranges of the engine and the drive motor and accumulates energy by the drive motor when stopped, the fuel consumption can be improved and used efficiently ,

Although the drive power meter is installed in the combination meter of the above-described hybrid vehicle or an ordinary vehicle, when a driver looks at the combination meter, it may be difficult to detect whether the corresponding vehicle is running in the BAZ.

The above information disclosed in this section is only for enhancement of understanding of the background of the invention and thus may include information that does not form the prior art that is already known to one of ordinary skill in this field.

SUMMARY

The present invention provides a method and system that controls a drive torque of a vehicle, wherein there is a change in torque of a predetermined magnitude when the drive power of the vehicle in reaches an area in which a predetermined maximum power is generated, and allows a driver to feel that the driving power of the vehicle comes into the maximum power range during driving.

According to an exemplary embodiment of the present invention, a method of controlling a drive torque of a vehicle may include calculating a drive request torque of a vehicle, calculating a drive power displayed on a drive power meter of a combination meter based on the calculated drive request torque, and adding a predetermined one additional torque to the drive request torque, when the calculated drive power, which is displayed on the drive power meter, comes in a predetermined range of the drive power meter.

The addition of a predetermined additional torque may be maintained for a predetermined time. In addition, the addition of the predetermined additional torque can be maintained while the calculated drive power displayed on the drive power meter is in the predetermined range of the drive power meter. A magnitude of the predetermined additional torque may be determined to allow a driver to sense the predetermined additional torque and to be set at approximately 5 to 10% of the drive request torque.

The vehicle may be a hybrid vehicle that uses an efficient combination of power of an engine and power of a drive motor. The method may further include distributing a torque obtained by adding the drive request torque and the predetermined additional torque to the engine and the drive motor.

In another embodiment, a system that controls a drive torque of a vehicle may include: a vehicle speed sensor that detects a vehicle speed, an accelerator pedal sensor (APS) that detects a position of an accelerator, an instrument panel that provides driving information, and vehicle status information; and a drive torque control unit that adds a predetermined additional torque to a drive request torque based on signals of the vehicle speed sensor and the accelerator sensor when the drive power of the vehicle enters a predetermined range of a drive power meter of the combination meter. The driving torque control unit may be operated by a predetermined program that performs the method of controlling the driving torque of the vehicle according to the exemplary embodiment of the present invention.

The drive torque control unit may include: a drive request torque mapping unit that maps a drive request torque corresponding to signals of the vehicle speed sensor and the accelerator pedal sensor; a drive power calculating unit that calculates the drive power based on data of the drive request torque mapping unit and the vehicle speed sensor signal; a filter unit that filters the drive power calculated by the drive power calculating unit by a signal displayed on the drive power meter of the combination meter; an additional torque calculating unit that calculates an additional torque to be added to the drive request torque based on a drive power indicative signal output by the filter unit; an adder unit that adds the additional torque calculated by the additional torque calculating unit and the drive request torque mapped by the drive request torque mapping unit; and a power distribution unit that distributes the added torque output by the adding unit to the engine and the drive motor.

As described above, according to the exemplary embodiment of the present invention, a torque of a predetermined magnitude can be changed when a driving power of a vehicle during driving comes within a range in which a predetermined maximum power is generated and allows a driver to feel that the drive power of the vehicle reaches the maximum power range.

BRIEF DESCRIPTION OF THE DRAWINGS

1 Fig. 10 is an exemplary schematic view showing a drive power meter according to the related art;

2 FIG. 10 is an exemplary block diagram showing a structure of a conventional hybrid vehicle according to the related art; FIG.

3 FIG. 10 is an exemplary block diagram showing a system that controls drive torque of a vehicle according to an exemplary embodiment of the present invention; FIG.

4 FIG. 10 is an exemplary detailed block diagram showing a drive torque control unit according to an exemplary embodiment of the present invention; FIG.

5 FIG. 10 is an exemplary flowchart of a method of controlling a drive torque of a vehicle according to an exemplary embodiment of the present invention; FIG. and

the 6 and 7 Figures 10 are exemplary graphs showing operations of an exemplary embodiment of the present invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

It will be understood that the term "vehicle" or "other vehicle" or similar term used herein includes motor vehicles in general, such as passenger cars containing off-road vehicles (SUVs), buses, trucks, various company cars, watercraft containing a variety of boats and vessels, aircraft and the like, and hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, hydrogen powered vehicles, and other alternative fuel vehicles (eg, fuels derived from non-petroleum fuels ). As referred to herein, a hybrid vehicle is a vehicle having two or more power sources, such as both gasoline powered and electrically powered vehicles.

While one exemplary embodiment describes using a plurality of units to perform the example process, it will be understood that the example processes may be performed by one module or a plurality of modules. In addition, it will be understood that the term controller refers to a hardware device that includes a memory and a processor. The memory is provided for storing the modules, and the processor is particularly intended for executing the modules for performing one or more processes which will be described below.

Additionally, the control logic of the present invention may be embodied as non-transitory computer-readable media on a computer-readable medium containing executable program instructions executed by a processor, a controller, or the like. Examples of computer readable media include, but are not limited to, read only memories, random access memories, compact disc read only memories (CD-ROMs), magnetic tapes, floppy disks, memory sticks, smart cards, and optical data storage devices. The computer-readable recording medium may also be distributed in network-coupled computer systems so that the computer-readable medium is stored and executed in a distributed fashion, e.g. By a telematics server or a Controller Area Network (CAN).

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used herein, the singular forms "a / a" and "the" should also include the plural forms, unless the context clearly indicates otherwise. It will also be understood that the terms "pointing to" and / or "having" when used in this specification specify the presence of said features, integers, steps, operations, elements, and / or components, but not the presence or exclude the addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. As used herein, the term "and / or" includes any or all combinations of one or more of the associated listed items.

Unless specifically stated or obvious from context, the term "about" as used herein is to be understood as within a range of normal tolerance in the art, for example, within 2 standard deviations of the mean. "Ca" may be considered within 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3%, 2%, 1%, 0.5%, 0.1%, 0, 05% or 0.01% of the stated value. Unless otherwise clear from the context, all numerical values provided herein are modified by the term "about."

The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. However, the present invention is not limited to the exemplary embodiments described below, but may be specified in other forms. Moreover, unless it is stated otherwise that a part contains a certain constituent, it does not mean, unless otherwise stated, that other constituents are excluded, but that the constituent may further be included. Throughout the description, the same reference numerals represent the same components.

2 FIG. 12 is an explanatory view schematically showing a hybrid vehicle to which a drive torque control system according to FIG exemplary embodiment of the present invention is applied.

Hereinafter, it will be described that a drive torque control system according to an exemplary embodiment of the present invention is applied to a hybrid vehicle. It should be understood, however, that the scope of the present invention is not limited thereto. The present invention can be applied not only to a hybrid vehicle but also to an ordinary vehicle using only the power of an engine, or a pure electric vehicle using only the power of a drive motor.

As in 2 1, a hybrid vehicle to which a drive torque control system according to an exemplary embodiment of the present invention is applied may be an engine 10 , a motor 20 , an engine clutch 30 that is used to interrupt power between the engine 10 and the engine 20 is provided, a transmission 40 , a differential gear 50 , a battery 60 and an integrated starter generator 70 included, for starting the engine 10 or generating power by power of the engine 10 is provided.

In addition, the hybrid vehicle to which the drive torque control system according to the exemplary embodiment of the present invention is applied may include a hybrid control unit (HCU). 200 , which is provided for operating the hybrid vehicle, an engine control unit (ECU) 110 Being used to press the engine 10 is provided, a motor control unit (MCU) 120 , which are used to actuate the drive motor 20 is provided, a transmission control unit (TCU) 140 which are used to actuate the transmission 40 is provided, and a battery control unit (BCU) 160 included, for managing the battery 60 is provided.

3 FIG. 10 is an exemplary block diagram showing a propulsion torque control system according to an exemplary embodiment of the present invention.

A driving torque control system according to an exemplary embodiment of the present invention may add a predetermined torque to a drive request torque when the drive power of a hybrid vehicle is in a predetermined range (eg, a boosting range and / or assisting range (BAZ)) of a drive power meter of a combination instrument; to drive the engine and / or the drive motor. In the drive torque control system, although the driver does not see the instrument cluster, he may feel that the vehicle is running in the BAZ.

The drive torque control system according to the exemplary embodiment of the present invention may include a vehicle speed sensor 302 , which is provided for detecting a vehicle speed, an accelerator pedal position sensor (APS) 304 device for detecting a position of an accelerator pedal, an instrument cluster (CL) provided for providing driving information and status information of a hybrid vehicle, and a driving torque control unit 300 for adding a predetermined torque to a drive request torque when the drive power of the hybrid vehicle is in a predetermined range (BAZ) of the drive power meter (PG) of the CL based on signals of the vehicle speed sensor 302 and the GSP 304 is provided.

According to the exemplary embodiment of the present invention, the vehicle speed sensor 302 For example, a vehicle speed sensor mounted on a wheel to detect a rotational speed or, for example, a vehicle speed sensor mounted on a final reduction gear of the transmission. It should be understood, however, that the scope of the present invention is not limited thereto. While other vehicle speed sensors may be used, the nature of the present invention may be applied to any sensor that allows a value corresponding to an actual vehicle speed to be calculated.

The GSP 304 may be a sensor that engages with an accelerator pedal to detect a position of the accelerator pedal. The CL can contain the PG which is in 1 is shown. The PG may contain the BAZ as related to 1 has been described.

In addition, the drive torque control unit (eg, a controller) may 300 at least one microprocessor operated by a predetermined program or containing hardware containing the microprocessor. The predetermined program may be formed of a series of commands that perform a later described drive torque control method according to an exemplary embodiment of the present invention.

According to the exemplary embodiment of the present invention, which is shown in FIG 3 is shown, the drive torque control unit 300 an engine control unit (ECU) used to operate the engine 10 of the hybrid vehicle is provided, a motor control unit (MCU), which is for actuating the drive motor 20 intended and a hybrid control unit (HCU) provided for operating the hybrid vehicle.

In the later described drive torque control method according to the exemplary embodiment of the present invention, partial processes may be performed by the drive torque control unit 300 and other sub-processes are performed by the ECU, the MCU or the HCU. However, it should be understood that the scope of the present invention is not limited to the description of the embodiments described later. A control unit may be configured by a combination different from that described in the exemplary embodiment of the present invention. The drive torque control unit 300 , the ECU, the MCU and the HCU may perform processes of a combination different from that described in the exemplary embodiment of the present invention. On the other hand, the drive torque control unit 300 be formed of a detailed block, which in 4 is shown.

In other words, the drive torque control unit 300 one unity 310 for mapping a drive request torque provided for mapping a drive request torque, the signals of the vehicle speed sensor 302 and the GSP 304 corresponds to one unit 320 for calculating a driving power necessary for calculating a driving power based on data of the unit 310 for mapping a drive request torque and the signal of the vehicle speed sensor 302 is provided, a filter unit 330 which filters through the unit 320 for calculating drive power calculated by a signal displayed on the PG of the CL, one unit 340 for calculating an additional torque necessary for calculating an additional torque to be added to the drive request torque based on one by the filter unit 330 output drive power indication signal is provided, an adder unit 350 which adds to the additional torque generated by the unit 340 for calculating an additional torque, and the drive request torque, which is calculated by the unit 310 for mapping a drive request torque, and a power distribution unit 360 included for distributing the added torque generated by the adder unit 350 is issued to the engine 10 and / or the drive motor 20 is provided.

Hereinafter, a method of controlling a drive torque of a hybrid vehicle according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

5 FIG. 10 is an exemplary flowchart showing a method of controlling a drive torque of a hybrid vehicle according to an exemplary embodiment of the present invention. As in 5 shown, the drive torque control unit 300 for calculating a drive request torque of a hybrid vehicle based on signals of the vehicle speed sensor 302 and APS 304 be provided. The drive request torque may be a torque requested by a driver.

When the signals of the vehicle speed sensor 302 and APS 304 can be entered, the drive torque control unit 300 for confirming the drive request torque corresponding to the signals by the unit 310 be provided for mapping the drive request torque. Next, the drive torque control unit 300 for calculating the drive power corresponding to the drive request torque based on the drive request torque provided by the unit 310 for representing a drive request torque, and the signal of the vehicle speed sensor 302 through the unit 320 be provided for calculating a drive power S120.

The calculated drive power can be displayed on the PG of the CL. If the drive power displayed on the PG is indicated by the unit 320 For calculating the drive power is calculated, the filter unit 330 the drive torque control unit 300 for filtering the calculated drive power by the signal displayed on the PG to output the filtered drive power. That through the filter unit 330 filtered drive power signal may be input to the PG to be used for displaying the drive power.

If the drive power is calculated at S120, the unit may 340 for calculating an additional torque of the drive torque control unit 300 for determining whether the drive power has a magnitude, the drive power being in the predetermined range (eg, BAZ) of the PG, based on the drive power signal provided by the filter unit 330 is output, S130. In response to determining at S130 that the drive power has a magnitude where the drive power is in the predetermined range, the unit may 340 for calculating an additional torque of the drive torque control unit 300 for calculating an additional torque added to the drive request torque based on the drive power signal S140. The amount of additional torque may be determined to allow a driver to feel the additional torque and may be set at, for example, about 5 to 10% of the drive request torque.

The unit 340 for calculating an additional torque may be provided for adding the calculated additional torque to the drive request torque only for a predetermined time (eg, one second), as in FIG 6 shown. The unit 340 For calculating an additional torque may be provided for continuously adding the calculated additional torque to the drive request torque, as in 6 shown. When the calculated additional torque is added to the drive request torque, since a torque and a vehicle speed may temporarily change as in FIGS 6 and 7 shown, feel that the drive power of the vehicle enters a power drive area, without looking at the instrument cluster.

When the extra torque through the unit 340 For calculating an additional torque is calculated, the adder 350 the drive torque control unit 300 be provided for adding the additional torque and drive request torque. That through the adding unit 350 added torque can be in the power distribution unit 360 the drive torque control unit 300 be entered. When the added torque into the power distribution unit 360 is entered, the power distribution unit 360 for applying an engine torque command and an engine torque command to the engine 10 and the drive motor 20 be provided to generate a torque in a predetermined ratio, S150.

When the distributed engine torque command and engine torque command to the engine 10 and the drive motor 20 can be created, the engine can 10 and the drive motor 20 be provided for generating a corresponding torque to produce a change in the driving torque and the speed, as in 6 and 7 shown, S160. Therefore, according to the exemplary embodiment of the present invention, the driver may feel that the drive power of the vehicle enters the power drive area without looking at the combination meter.

While this invention has been described in conjunction with what is presently considered to be practical exemplary embodiments, it should be understood that the invention is not limited to the disclosed embodiments but, on the contrary, is intended to cover various modifications and equivalent arrangements that may be included within the spirit and the art Area of the appended claims are included.

LIST OF REFERENCE NUMBERS

10

combustion engine

20

drive motor

110

Engine control unit (ECU)

120

Motor control unit (MCU)

300

Drive torque control unit

302

Vehicle speed sensor

304

Accelerator pedal sensor (APS)

CL

instrument cluster

PG

Drive power meter

Claims (14)

A method for controlling a drive torque of a vehicle comprising: Calculating a drive request torque of a vehicle by a controller; Calculating a driving power displayed on a drive power meter of a combination meter by the controller based on the calculated drive request torque; and Adding a predetermined additional torque to the drive request torque by the controller when the calculated drive power displayed on the drive power meter enters a predetermined range of the drive power meter. The method of claim 1, wherein the addition of the predetermined additional torque is maintained for a predetermined time. The method of claim 1, wherein the addition of the predetermined additional torque is maintained while the calculated drive power displayed on the drive power meter is in the predetermined range of the drive power meter. The method of claim 1, wherein the magnitude of the predetermined additional torque is determined to allow a driver to feel the predetermined additional torque, and is set at approximately 5 to 10% of the drive request torque. The method of claim 1, wherein the vehicle is a hybrid vehicle that provides an efficient combination of power of an engine and Power of a drive motor is used, and wherein the method further includes: distributing a torque, which is obtained by adding the drive request torque and the predetermined additional torque, to the engine and the drive motor by the controller. The method of claim 1 further comprising: Mapping, by the controller, the drive request torque corresponding to signals of the vehicle speed sensor and accelerator pedal sensor; Calculating the drive power by the controller based on the mapped data of the drive request and the signal of the vehicle speed sensor; Filtering by the controller the calculated drive power through a signal displayed on the drive power meter of the instrument cluster; Calculating, by the controller, an additional torque to be added to the drive request torque based on an output drive-output indicative signal; Adding, by the controller, the calculated additional torque and the mapped drive request torque; and Distributing the output added torque to the engine and the drive motor by the controller. A system that controls a drive torque of a vehicle, comprising: a vehicle speed sensor provided for detecting a vehicle speed; an accelerator pedal sensor provided for detecting a position of an accelerator pedal; an instrument cluster provided for providing driving information and status information of the vehicle; and a drive torque control unit provided for: Calculating a drive request torque of a vehicle; Calculating a drive power displayed on a drive power meter of a combination meter based on the calculated drive request torque; and Adding a predetermined additional torque to a drive request torque when the drive power of the vehicle enters a predetermined range of a drive power meter of the combination meter based on signals of the vehicle speed sensor and the accelerator pedal sensor. The system of claim 7, wherein the addition of the predetermined additional torque is maintained for a predetermined time. The method of claim 7, wherein the addition of the predetermined additional torque is maintained while the calculated drive power displayed on the drive power meter is in the predetermined range of the drive power meter. The method of claim 7, wherein a magnitude of the predetermined additional torque is determined to allow a driver to feel the predetermined additional torque, and is set at approximately 5 to 10% of the drive request torque. The method of claim 7, wherein the vehicle is a hybrid vehicle that uses an efficient combination of power of an engine and power of a drive motor, and the method further includes: Distributing a torque obtained by adding the drive request torque and the predetermined additional torque to the engine and the drive motor by the controller. The system of claim 7, wherein the drive torque control unit is further provided to: Mapping the drive request torque corresponding to signals of the vehicle speed sensor and accelerator pedal sensor; Calculating the drive power based on the mapped data of the drive request and the signal of the vehicle speed sensor; Filtering the calculated drive power by a signal displayed on the drive power meter of the instrument cluster; Calculating an additional torque to be added to the drive request torque based on an output drive-output indicative signal; Adding the calculated additional torque and the mapped drive request torque; and Distributing the output added torque to the engine and the drive motor. A non-transitory computer-readable medium having program instructions executed by a processor or controller, the computer-readable medium comprising: program instructions that control a vehicle speed sensor to detect a vehicle speed; Program instructions that control an accelerator pedal sensor to detect a position of an accelerator pedal; Program instructions that control an instrument cluster to provide driving information and status information of the vehicle; and Program instructions that calculate a drive request torque of a vehicle; Program instructions that calculate a drive power displayed on a drive power meter of a combination meter based on the calculated drive request torque; and program instructions that add a predetermined additional torque to a drive request torque based on signals of the vehicle speed sensor and the accelerator sensor when the drive power of the vehicle comes within a predetermined range of a drive power meter of the combination instrument. The non-transitory computer-readable medium of claim 13, further comprising: Program instructions that map the drive request torque corresponding to signals of the vehicle speed sensor and the accelerator pedal sensor; Program instructions that calculate the drive power based on the mapped data of the drive request and the signal of the vehicle speed sensor; Program instructions that filter the calculated drive power by a signal displayed on the drive power meter of the instrument cluster; Program instructions that calculate an additional torque to be added to the drive request torque based on an output drive-output indicative signal; Program instructions that add the calculated additional torque and the mapped drive request torque; and Program instructions that distribute the output added torque to the engine and the drive motor.

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